The notion that Emperor Constantine created the Bible during the Council of Nicaea is not supported by primary sources or reliable historical evidence. While Constantine played a significant role in the history of Christianity and officially tolerated the Christian faith with the Edict of Milan in 313, the formation of the biblical canon happened through a more extended and consensual process.

Claims suggesting that Constantine formulated the Bible during the Council of Nicaea can be traced back to the 18th-century philosopher Voltaire, who used a satirical anecdote from the 9th century to support this idea. However, subsequent historians have refuted these claims.

The earliest known list of the canon of Holy Scripture is attributed to Pope Damasus in the 4th century. The formation of the New Testament books list did not happen quickly or smoothly. The Catholic Church, represented by the apostolic authority of bishops and supported by tradition, had the responsibility of discerning and listing the books considered directly inspired by God. This process involved consensus among the entire Catholic world.

Before the formation of the biblical canon, early Christians relied on tradition. The books of the New Testament were written over several decades, with the oldest, the First Letter of Saint Paul to the Thessalonians, composed almost 20 years after the ascension of Jesus, and the most recent, the book of Revelation, written around the year 90.

The Church had to navigate different groups advocating for inclusion or exclusion of various books in the biblical canon. Some groups, like the Gnostics, supported apocryphal books, while others, like the Marcionites, recognized only specific texts.

In conclusion, the formation of the biblical canon was a complex process that took place over centuries and involved the discernment and consensus of the Catholic Church, not a creation by Emperor Constantine during the Council of Nicaea.